Flush valve



B. F. GABLE.

FLUSH VALVE.

APPLICAUON FILED luNzzo. 1918.

rammed .131.124, 1922.

WITNESSES 870% V/ATTORNEYS UNITED STATES PATENT OFFICE.

BENJAMIN F. GABLE, OF BERKELEY, CALIFORNIA, ASSIGNOR OF ONE-THIRD TO PACIFIC SANITARY MANUFACTURING COMPANY, OF SAN FRANCISCO, CALI- FORNIA, A CORPORATION OF CALIFORNIA.-

FLUSH VALVE.

Specification of Letters Patent.

Patented Jan. 24.-, 1922.

Application filed June 20, 1918. Serial No. 240,917.

v To all whom t may concern.'

Be it known that l, BENJAMIN F. GABLE, a citizen of the United States, and a resident of Berkeley, county of Alameda, and Sta-te of California, have invented a new and useful Flush Valve, of which the following is a speciication.

My invention relates to valves for the control of the How from flush tanks.

An object of the invention is to provide a valve for use in flush tanks which will remain in the open position, to which it has been moved, during the discharge of water from the tank and will close automatically as soon as the flow ceases.

rThe invention possesses other features of advantage, some of which, with the foregoing, will be set forth in the following description of the preferred form of my invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood that I do not limit myself to the showing made by the said drawings and description, as I may adopt variations of the preferred form within the scope of my invention as set forth in the claims.

Referring to the drawings:

Figure 1 is a -vertic'al section through the valve mechanism, a portion of the valve stern being broken away to better disclose the parts.

Figure 2 is a horizontal section taken on the line 2-2 of Figure 1.

Figure 3 is a detail view of a portion of the mechanism.

Fig. 4 is a vertical sectional view of a portion of the device taken in the plane indicated by the line 4 4 of Fig. 2. Fig. 5 is a perspective of the shaft 21 and offset shoe 22.

My inventionconsists of a valve to control the flow of water from a fiush tank to the toilet bowl and comprises a valve casing 2 adapted to be arranged in the flush tank (not shown). An overflow pipe 3 is connected to an extension 4 of the casing 2 and communicates with the interior of the casing by the passage 6. l The upper edge 7 of the casing forms a valve seat and a valve 8 preferably formed of rubber or comparable material faced with metallic washers 9 controls the fiow of water from the fiush tank through the casing 2 to the bowl. The valve 8 is movable vertically to open or close the passage through the valve seat and is mounted upon a valve rod or stem 11 which is slidably arranged in the bracket 12 conveniently secured to the overflow pipe 3, and to the bracket 13 secured within the easing 2. The valve stem 11 is raised to open the valve by the usual means which are well known and need not be described herein. The bracket 12 serves as a stop to limit the movement of the valve.

Means are provided for holding the valve 8 in the open position to which it has been raised to permit the How of water through the valve, and this means is operated by the water itself so that upon the emptying of the flush tank and the stoppage of the iowof water therefrom, the valve will close automatically, and the tank again fill. The bracket 13 is conveniently formed of a metallic strip folded to provide an elongated eye 16. The proportions of the bracket are such that the valve rod 11 concentric with the casing 2, lies against the outer wall 17 of the eye, and means are provided within the eye for retaining the Astem 11 against the wall at all times so that the stem and valve are not laterally displaceable; and for pressing the stem against the wall with suflicient force during the passage of water through the casing 2te retain the stem and valve in any position to which they are moved when the valve 8 is raised. A recess 18 is cut in the wall 17 of the bracket to provide a bearing 19 in each wall of the eye and a shaft 21 provided with an offset portion 22 is journalled in these bearings. The offset portion comprises a shoe which bears against the valve stem 11, and when the shaft 21 has been'seated in the bearings and the stem 11 inserted between the shoe 22 and the wall 17, lateral displacement ofthe valve stem is prevented and clockwise rotation of the shaft 21, as viewed in Figure 1, will cause the shoe' 22 to clamp the stem 11 against the wall 17 of the eye, It is to be noted that the axis of rotation of the shaft 21 lies between the wall 17 on one side and the shoe on the other side, so that downward pressure on the valve stem tends to disengage the shoe therefrom and does not tend to tighten the shoe pressure, such as would be the case if the shoe was between the axis and the wall. Consequently there can be no possible tendency for the shoe to jam against the stem and prevent the proper closing of the valve when pressure on the shoe is released.

The shaft 21 is turned to actuate the shoe by means of a plate 24 secured rigidly thereto and extending outwardly and preferably downwardly into the passage 26 through which the water iiows from the flush tank. The plate is provided with a recess 27 in which the eye of the bracket and the stern 11 lie without touching. Preferably the bracket 13 is removably secured to the casing by means of oppositely disposed anges Q8 adapted to be engaged behind the bar 29 secured to the wall of the easing and spaced therefrom. The bar is provided with a notch vadapted to receive the portion 31 of the bracket.

The parts are assembled by first passing the shaft 21 through the recess 18 to a seat lon the bearings 19. The bracket with shaft and plate in place is next engaged with the bar 29, after which the lower portion of the valve 'stem with valve attached is inserted between 'the shoe and wall 17. The upper portion of the valve stem and the bracket 12are then added. 1

4Operation: Upward movement of the valve stem, raises the valve 8 and permits water from the flush tank to flow through the casing 2. No resistance to theupward movement of the valve stem is offered by the shoe since the weight of the plate v2li is "as the water inipinges upon the plate 24.

As soon as the stream has been reduced so that no water strikes the plate, the weight lof the stem and valve causes the latter te fall upon the valve seat se that further discharge from the tank is prevented until the valve is again raised. No jamming of the stem between shoe and wall 17 is possible since movement of the stem 11 in either direction tends to move the shoe away from thewall, and it is only by the impact of water upon the plate'Qa that the shoe is pressed against the Stem.

l claim:

1. A flush valve comprising a casing, a seat formed in said casing, a valve arranged on said sheet, a stem on said valve, a bracket removably attached to -the inside wall of said casing and having an eye therein through which said stem passes, a shoe pivotally arranged iii said eye in engagement with said stem, and a plate attached to said shoe and adapted to be moved by the water passing through said valve to f clamp said stem against the wall of said eye, the axis of said pivot and the wall of said eye lying on the same side of said shoe.

Q. In a flush valve, a valve seat, a valve adapted toceiigage said seat, a bracket arranged below said valve seat, a stem on said valve passing through and engaging said bracket, a shaft pivotally mounted in said bracket onan axis intercepting said stem, a shoe formed on said shaft by offsetting the center thereof and adapted to engage the side of said stem opposite the side engaged by said bracket, anda plate fixed on said shaft and disposed on the opposite sidel of said stem from said shoe.

ln testimony whereof, l have hereunto set mv hand at San Francisco, California, this A12th day of June 1918.

BnNJAMiN r. Gaeta.

ln presence of- C. S. EVANS. 

